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| Jan-05-15 | | TheBish: Magnus had to be in time pressure to miss such a simple tactic! Because if he weren't, he surely would have been suspicious of such an obvious "blunder" that leaves a hanging bishop, and taken some time to think about it until he saw what he should have seen instantly! |
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| Jan-05-15 | | agb2002: Black has a rook for a bishop, a knight and a pawn.
The white queen prevents 37... Rc1#. Hence, 37... Qd3+ wins. The other move order fails: 37... Rc1+ 38.Qxc1 Qd3+ 39.Nc2 and if 39... Rxc2 then 40.Qxg5+ mates in two. |
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| Jan-05-15 | | cocker: Not as obvious as most Mondays. I expected 37 ... Rc1+ to be the answer. |
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| Jan-05-15 | | morfishine: <37...Qd3+> forces mate due to the suffocating pawn at <b3> <TheBish> Who knows, I've seen worse ***** |
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| Jan-05-15 | | Once: Well, yes. Deflect the queen and give mate on the back rank. Nice and easy for a Monday. It is hard to see what else white could have played instead of 37. Rxe7. At first I thought that 37. Rd4 might defend (at least for a little while). 
click for larger viewBut then you spot the quite brutal 37...Qc6 and the tripled heavy pieces are crashing through. Yuck. Fritzie also points out 37...Qe2 with echoes of the POTD solution. |
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| Jan-05-15 | | stacase: Once I stopped trying to move White's pieces to mate White's King (Duh!) it fell apart. |
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| Jan-05-15 | | whiteshark: bazinga! |
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| Jan-05-15 | | zb2cr: 37. ... Qd3+ and White must lose the Queen or be mated. |
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| Jan-05-15 | | varishnakov: 37...Q-Q6+ and that's that
queen sac, remove the guard, back-rank mate |
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| Jan-05-15 | | TheaN: Monday 5 January 2015 <37....?> Black has his rooks aiming at white's back rank, but white played a seemingly adequate defense by having the queen and king defending c1: one golden rule of defensive chess is that the king is not a great defender, as he cannot defend against a protected piece: other pieces can still lower the pressure by trading. Black utilizes this rule with <37....Qd3+>. Of course 38.Qxd3 Rc1# and black accomplished what he wanted, but there's no decent alternative for white and he might as well allow that mate. 37.Qc2 is just silly, 37....Rxc2! to keep the threats and white is soon mated. Regardless, <38.Nc2 Qxd2  > and white will not avoid mate much longer either. |
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| Jan-05-15 | | TheaN: Ha missed white can play 38.Ka1, but that looks even more silly than just capturing the queen on d3 as it removes the other defender of c1. Despite the mate, the white queen is still lost. For what it's worth, Qd3+ announces mate in 5:
<38.Qxd3 Rc1#> #1
<38.Ka1 Rc1+ 39.Qxc1 Rxc1#> #2 <38.Nc2 Qxd2> taking the queen directly is an improvement over bxc2+, which blocks the rooks <39.Re8+ Rxe8 40.Bf4 gxf4 (Δ Qd1#) 41.Ne3 Rc1#> #4 <38.Qc2 Rxc2 39.Re8+ Rxe8 40.Bf4 gxf4 41.g3> moving the knight allows Qd1# <41....fxe3> with <42....Qd1#>. #5. |
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| Jan-05-15 | | awfulhangover: I saw the name Carlsen - so I tried to find a win for white. If it hadn't been a monday puzzle, I could have sit a long time in vain! Facepalm! |
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| Jan-05-15 | | DIO: Longest Monday puzzle for me to solve ... I was tricked by "Carlsen" as white and I spent about 5 minutes looking for a forced win for white ... oh well! |
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| Jan-05-15 | | Lambda: Quite a few false trails here for a Monday. I had a moment of "I've exhausted all the most obvious ideas. Hey, how about deflecting the queen with something like Qe2 like that famous back rank mate thing where it runs out of squares on the diagonal? Or Qd3 does it with check, even better." |
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| Jan-05-15 | | Oxspawn: Well if this is Monday I have lost the plot. The queen would like to mate on f1 but not while the white knight is in situ and I can’t see how to shift it. I thought the ‘solution’ was 37. Qe2 the point being that if
38. Qxe2 then Rc1 is mate.
or
If
38. Re87+ Kf2 (not Rxe1 when the white queen can capture the black queen)
And white still stands to lose the queen or be mated
Another try for white
37. Qe2
38. Be1 Rc1+
39. Qxc1 Rxc1+
40. Kxc1 Qxe1+
41. Nd1 Qxe7
This seems very long winded for a Monday so I guess I missed something quicker more direct. But then even on a good day I am not fit to dust the pieces for Nijboer, let alone Carlsen. |
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| Jan-05-15 | | Oxspawn: Qd3 not e2. I moved to the wrong neighbourhood. Only just the wrong neighbourhood but missed out on the good schools,free parking, low taxes and quick win. |
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Jan-05-15
 | | perfidious: <Oxspawn> Missing all that good stuff sounds losing in any case..... |
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| Jan-05-15 | | Castleinthesky: Harder than your average Monday puzzle, which is usually a "sight puzzle" for me. After trying to find all the permutations of Rc1 followed by Qd3, I finally reversed the order and got the solution. I guess I'm the new world champ, like the rest of my CG Kibitzers. |
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| Jan-05-15 | | patzer2: Correction: White's decisive mistake was 31. Qd2?, allolwing 31...f5! . Instead, 31. Qxb5 Bxb5 32. Bxd6 Bxd6 33. Rxd6 Rc4 34. Rd3! = to  neutralizes the Black initiative. |
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| Jan-05-15 | | kevin86: The queen sac is at the unusual square to set up a back row mate. Qd3+!!, the white queen is diverted from c1 and mate follows by the two rooks. |
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Jan-05-15
 | | chrisowen: Am d3 ply in batch a map ma d3 probe queen am d3.
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interpose a d2 queen at a c2 and rook c5 recaptures mate still in the bag too. |
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| Jan-05-15 | | ukmark62: If 38. Nxc2, then black just does Qxd2. |
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| Jan-05-15 | | chesseswar: Note that this game took place in 2005. Carlsen was no where near as strong as he is today back then. Thus, such a simple blunder, probably in time pressure, is understandable. But if this game was recent (within the past year), this would just be a ridiculous blunder... a careless mistake. |
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| Jan-05-15 | | stst: just visual:
37....... Qd3+
IF 38.
(A)QXQ Rc1#
(B) Ka1 QxQ easy win
(C) Qb2 RxQ then
39.NxR QxN+
40.Ka1 Qc1# |
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| Jan-05-15 | | BOSTER: The battle against white Bishop on g5 in the <Sicilian> has long long story. This pos. with Pilnik's novelty 9...g5 was played in Gothenberg,1955 where Russian team Geller,Spassky,Keres defeated Argentian team in the "total chess war" (all three boards had the same pos.) with brilliant combo, sacr. a Knight, offering the Bishop Bb5 and retreat Bishop h4-g3.
click for larger view
White to play.
Who would dare to play this line again?
The answer: 15 years old Robert Fischer in the final round of the Portoroz Interzonal,1958 with black pieces vs Gligoric, world class GM, where Fischer prepared his homework with novelty 13...Rh7 till move 30! So, playing 10...g5 in the game Carlsen vs Nijboe I guess both players knew this <Sicilian Vespers> very good. |
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sac: 36...Rfc8